openbeam compatable hole drilling guides

I have trouble drilling straight on my openbeam printed parts ,
so I made this.
Use as you like.

Note:
Added A , B , C. version3
A = for 10x15mm centre hole (5mm thick)
B = for 15x15mm centre hole (5mm thick)
C = for 15x15x15mm centre for drilling openbeam.

If your designed part is 4mm thick use A or B ,and use other hole.
If you have 9mm thickness (x15mm) use C , top hole.

Update:
may want to use a new one every 20 holes or so,
the hole will start to oval after a while affecting acuracy.
this does drill em nice and straight though.
oh and only spin the drill as needed to increase lifespan.

OpenBeam / Open Beam / Openbeamusa
is copyright of Openbeamusa .

I am not affiliated in any way with this product.
All credit ownership goes to them.
I am only sharing compatable items I have designed.
My thanks to them for a very excellent product.
If openbeam chooses to incorporate any of my designs
I welcome it.

Thanks.